I was the one on the dark side that posted the IRS would not work with the truckirs.com brackets. There is nothing wrong with the parts I received as they will work as advertised, I unfortunately was trying to use them with a front suspenion that had not been tried with the brackets (Panther IFS from a 07 Marquis). I had it all mocked up as Dave told me (he helped me over the phone that day) and they came up short, again nothing wrong with the brackets.
Fast forward some time and carcrafter22 pulled it off, without brackets, by cutting off the mounting ears and welding it up to his boxed in frame. Proved me way wrong. My hat is off to him!
Ive been studying carcrafter22's photos and plan on tackling the IRS install once I get home from this deployment. Ive been researching CV axles, and have been thinking about building a jig to widen the IRS cradle, which would need longer CV axles. This would be to eliminate the need for the wheel adapters to widen the IRS track width. Though there seems to be a even split of opinion on the use of adapters, which leads me to just get some, have a channel milled between the lugs and safety wire them and forget it.
Here are 3 great sites for info on what parts to get to rebuild the IRS suspension, How to strengthen the IRS, and a wheel size calculator with the particular sizes of 18's I would like to use. If I were not to use adapters and had the coin to spend on wheels I would need a -19 offset rear wheel for it to have the same track width as the front. Ive priced everything through rockauto for the rear suspenion rebuild and it comes out to exactly 445 dollars with the 5% discount, this would be for the brake lines, and the parts outlined in the TCCOA thread. That does not include the Cobra hubs, Cobra rear rotors, caliper brackets, new bearing, or hub nuts, differential mount bushings, 4.10 gears, gear install kit, that I already have at the house waiting for this install. Or the cost of the 93 Mark VIII IRS assembly.
**http://forums.tccoa.com/showthread.php?t=99795http://www.rims-n-tires.com/rt_specs.js ... Wheel-Tire